16721155106 has 8 divisors (see below), whose sum is σ = 25083411564. Its totient is φ = 8360017920.

The previous prime is 16721155097. The next prime is 16721155109. The reversal of 16721155106 is 60155112761.

It can be written as a sum of positive squares in 2 ways, for example, as 16288140625 + 433014481 = 127625^2 + 20809^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (16721155109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241415 + ... + 302858.

Almost surely, 2^16721155106 is an apocalyptic number.

16721155106 is a deficient number, since it is larger than the sum of its proper divisors (8362256458).

16721155106 is a wasteful number, since it uses less digits than its factorization.

16721155106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559636.

The product of its (nonzero) digits is 12600, while the sum is 35.

Adding to 16721155106 its reverse (60155112761), we get a palindrome (76876267867).

The spelling of 16721155106 in words is "sixteen billion, seven hundred twenty-one million, one hundred fifty-five thousand, one hundred six".